The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The only letter not appearing on the Periodic Table is the letter "J".
180
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
Sound at the right vibration can bore holes through a solid object.
134
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
4.5 pounds of sunlight strike the Earth each day.
27
A single speck of dust is half way in size between a subatomic particle and the Earth.
15